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AssetsI Engineering I Environment I Noise I Spatial I WasteConstruction Quality Assurance PlanPilbara Regional Waste Management Facility- Cell 1Development and Associated Worksshire of Ashburtonreef to rangePrepared for Shire of AshburtonFebruary 2019Project Number: TW17053

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburtontalisdelivering solutionsDOCUMENT ernal Review15/01/19csLMlaReleased to Client11/02/19LMLM EP---- ---------------- ----- ----- --JApproval for ReleaseCopyright of this document or any part of this document remains with Tatis Consultants Pty Ltd and cannot be used,transferred or reproduced in any manner or form without prior written consent from Tatis Consultants Pty Ltd.1W17053 - CQA Plan.laFebruary 2019I Page i

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of AshburtontalisTable of Contents1Introduction . 12Definitions . 22.1 Material Definitions . 23Roles of Participants . 43.1 Superintendent . 43.2 Design Engineer . 43.3 CQA Consultant . 43.4 Contractor . 43.5 Resin Supplier. 43.6 Geosynthetic Manufacturer. 53.7 Geosynthetic Installer . 53.8 Geosynthetic Materials Testing Laboratory . 53.9 Soil Testing Laboratory . 54Description of Works . 65Daily Reporting and Documentation . 75.1 General . 75.2 Daily Record Keeping . 75.3 Construction Issues . 75.4 Photographic Records . 85.5 Design and/or Specification Change . 86Requirements of CQA Validation Report . 91W17053 - CQA Plan.laFebruary 2019I Page ii

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of AshburtontalisAppendicesAppendix A : Technical Specification1W17053 - CQA Plan.laFebruary 2019I Page iii

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburton1talisIntroductionThe purpose of the Construction Quality Assurance Plan (CQA) Plan is to detail the testing methodsand quality assurance procedures required for the cell development at the Pilbara Regional WasteManagement Facility (PRWMF), Onslow, including: Earthworks to construct Cell 1 of the waste management facility, leachate evaporation,sullage and surface water management ponds and associated drainage; Construction of a 500mm thick Engineered Attenuation Layer; Supply & Installation ofthe geosynthetic secondary lining system comprising;o Geosynthetic Clay Liner (GCL);o 2mm High Density Polyethylene (HDPE) Double Textured Geomembrane; ando Geonet/Drainage geocomposite. Supply & Installation ofthe geosynthetic primary lining system comprising;o Geosynthetic Clay Liner (GCL);o 2mm High Density Polyethylene (HDPE) Double Textured Geomembrane; ando Cushion/protection geotextile.Placement of 300mm thick gravel primary leachate collection layer; Supply and installation of leachate collection pipework comprising: o225mm Outer Diameter (OD) HDPE perforated primary pipeworko160mm OD HDPE perforated secondary pipework; ando110mm OD HDPE perforated leak detection layer collection pipe.Construction of leachate extraction/evaporation infrastructure comprising:o450mm OD HDPE leak detection side riser pipe;o450mm OD HDPE primary side riser pipe; andoLeachate side riser concrete headwalls; and2mm HDPE double lined leachate evaporation pond. Construction of Sullage Evaporation Ponds comprising;o Geosynthetic Clay Liner (GCL);o 2mm High Density Polyethylene (HDPE) Double Textured Geomembrane; ando Concrete reception ponds. Construction of Surface Water Management infrastructure including:o Surface water attenuation pond; oSurface water infiltration/evaporation pond; andoAssociated drainage swales and culverts.Construction of Levee Embankment including:o Placement of 150mm thick filter layer;oInstallation of separator geotextile; andoPlacement of riprap stone protection layer with maximum diameter 225mm.This plan shall be read in conjunction with the Technical Specification (the Specification) [AppendixA], and the drawings for the Works. Further detailed and specific construction procedures andrequirements are outlined in the Specification and drawings. This document does not replace theSpecification or drawings.1W17053 - CQA Plan.laFebruary 2019I Page 1

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburton2talisDefinitionsFor the purposes of the CQA Plan guidelines, the following terms are defined below:'Construction Quality Assurance' (CQA) -A planned system of activities that provide assurance thatmaterials or construction activities are undertaken and installed as specified in the design.'Construction Quality Control' (CQC) - The process of measuring and controlling the characteristicsof the item/product in order to meet the manufacturers or project specifications.'The Principal' shall be as defined in the Conditions of Contract and for this Project will be the Shireof Ashburton.'The Contractor' shall mean the future company contracted by the Principal to execute the Worksand complete the project.'The Superintendent' shall be as defined in the Conditions of Contract.2.1Material Definitions'Subgrade' - In-situ soils with suitable geotechnical characteristics to form a firm and unyieldingsurface for engineering purposes.'Engineered Attenuation Layer' - A minimum 500mm thick engineered attenuation layer sourcedfrom site won 'Pindan Sand', constructed on the base and side slopes of the landfill above thenaturally occurring in situ soils. The key purpose is to provide a level of natural attenuation and asuitable engineered surface for the placement of the geosynthetic lining system.'Geosynthetic Clay Liner' (GCL) - A factory-manufactured hydraulic barrier consisting of sodiumbentonite clay supported by geotextiles held together by needling, stitching, or hylene resins, geotextiles (and composites thereof) to transmit fluids and gasesuniformly under many field conditions.'Geomembrane' - A geomembrane is very low permeability synthetic membrane liner or barrierused with any geotechnical engineering related material so as to control fluid (or gas) migration in ahuman-made project, structure, or system.'Cushion/Protection Geotextile' - Any permeable non-woven textile, used with foundation, soil,rock, earth, or any geotechnical engineering related material as an integral part of a human-madeproject, structure, or system.'Leachate Collection Pipe'- 100mm, 160mm or 225mm HDPE perforated SDR17 solid wall pipe.'Leachate Drainage Aggregate'- Nominal 40mm permeable drainage aggregate.1W17053 - CQA Plan.laFebruary 2019I Page Z

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburtontalis'Separation Geotextile' - Any permeable textile woven or non-woven, used with foundation, soil,rock, earth, or any geotechnical engineering related material as an integral part of a human-madeproject, structure, or system.'Minimum Average Roll Value' (MARV) -The minimum average value of a particular physicalproperty of a material, for 95 percent of all of the material in the lot.'Overlap' - Where two adjacent geosynthetic panels contact, the distance measuring perpendicularfrom the overlying edge of one panel to the underlying edge of the other.1W17053 - CQA Plan.laFebruary 2019I Page 3

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburton3talisRoles of ParticipantsThe participants and/or parties that have been identified as key personnel in the delivery of thisProject include, but are not necessarily limited to Principal and Superintendent; Design Engineer;CQA Consultant; Contractor; Resin Supplier; Geosynthetics Manufacturer; Geosynthetics Installer;Geosynthetics Materials Testing Laboratory and Soils Testing Laboratory. The roles andresponsibilities ofthe participants and/or parties are detailed below.3.1SuperintendentDuring the construction, the Superintendent acting on behalf of the Principal will serve as a singlepoint of contact for the Design Engineer, Contractor and CQA Consultant during construction.3.2Design EngineerThe design engineering services for the earthworks and landfill cell construction works will beprovided by Talis Consultants (Talis). The Design Engineer reviews and approves any proposedchanges in design during construction.3.3CQA ConsultantThe CQA Consultant is an independent party not affiliated with the contractor, subcontractors,suppliers or manufacturers. The CQA Consultant may be the Design Engineer. The CQA Consultanthas the overall responsibility for managing, coordinating and implementing the CQA activities andconfirming that the Contractor's construction quality control activities are performed in accordancewith the CQA Plan, construction drawings and Technical Specifications. Critical activities related tothe construction, manufacture and installation of the earthwork, geosynthetics, civil improvementsand other project components will be monitored and documented by the CQA Consultant. The CQAConsultant will be responsible for issuing a Final Certification Report containing CQA documentationsufficient to satisfy regulatory requirements and the requirements of this CQA Plan.3.4ContractorThe Contractor is responsible for the timely construction of the project, as delineated in thedrawings and Technical Specifications and in accordance with this CQA Plan. The Contractor is alsoresponsible for the CQA. In particular, the Contractor shall ensure that: Only materials meeting the requirements set forth in the Technical Specifications anddrawings are used; and The materials are installed in full conformance with the Technical Specifications and DesignDrawings.3.5Resin SupplierThe resin supplier produces and delivers the resin to the geosynthetics manufacturer. Qualificationsof the resin supplier are specific to the manufacturer's requirements.1W17053 - CQA Plan.laFebruary 2019I Page 4

Construction Quality Assurance PlanPi Ibara Regional Waste Management Facility - Cell 1 Development and Associated WorksShire of Ashburton3.6talisGeosynthetic ManufacturerThe geosynthetic manufacturer is responsible for the production of finished material fromappropriate raw materials. The geosynthetic manufacturer reports to the geosynthetics installer.3.7Geosynthetic InstallerThe geosynthetics installer is the Contractor or their subcontractor. The geosynthetics installer isresponsible for field handling, storage, placement, seaming, loading or anchoring against wind upliftand other aspects of the geosynthetic material installation. The geosynthetic installer will be trainedand qualified to install geosynthetic materials of the type specified for this Project.3.8Geosynthetic Materials Testing LaboratoryIn the performance of the CQA activities, the CQA Consultant may engage a National Association ofTesting Authorities (NATA) accredited materials testing laboratory, independent from theContractor, subcontractors, or any material supplier or manufacturer. The testing laboratory willconduct tests on representative samples to evaluate their properties and compliance with theTechnical Specifications.3.9Soil Testing LaboratoryIn the performance of the CQA activities, the CQA Consultant may engage a NATA accredited soilstesting laboratory, independent from the Contractor,